Description:
In the scope of this PR, we are adding the ESLint tool and updating Prettier:

• ESLint dependencies were added;
• Configuration files .eslintrc.js and .eslintignore were added;
• Prettier dependency was updated;
• Configuration files .prettiertrc.js and .prettierignore were added, .prettierrc.json was removed;
• Commands in the package.json file were updated;
• Repository was formatted and linted according to the added configuration files;
• Unit-tests were updated;
• File .gitattributes was updated to force git to replace CRLF eof to LF eof;

Check list:

• Mark if documentation changes are required.
• Mark if tests were added or updated to cover the changes.